Question

Matthew was modeling an activity to the class. In a brown paper bag, he had 3 red marbles, 2 blue, and 5 green marbles. What is the probability of Matthew choosing a red marble, NOT replacing the marble, and then selecting a blue marble from the bag?​

Answer 1

probability of getting a red marble: 3/10
probability of getting a blue marble (after removing a red marble): 2/9

multiply the two fractions together:
6/90

simplify (divide by 6): 1/15 or .06666 repeating